Project Hub /Basic Analog & Power Electronics/Power Supplies & Voltage Regulators/DIY USB MP3 Player for Under ₹150

Beginner

ANALOG / DISCRETE

< ₹500

3 – 6 Hours

Partial Kit

DIY USB MP3 Player for Under ₹150

Build a functional USB MP3 player featuring an SD card reader, FM radio, and auxiliary input for under 150 rupees using a standard module and kit components.

Originally published on ElectronicsForU

View original tutorial

Parts You'll Need

This project is sourced from another site, not written by us — this list is our best match of their components against what we stock, not a verified bill of materials. Always check the original blog (linked above) for the actual parts list before buying.

Jumper Wire 10 Pin Male To Male 20cm Rs. 45.00
IR Proximity Sensor Module With Pot Rs. 55.00
MB102 Adjustable Breadboard Power Supply Module (3.3V & 5V) for Arduino & Raspberry Pi Rs. 139.00
2-Slot 18650 Holder with Protective Cover and On/Off Switch – Case Rs. 109.00
400 Points Mini Solderless Prototype PCB Breadboard High Quality Rs. 89.00
Jumper Wire 10 Pin Male To Female 20cm Rs. 45.00

Selected: Rs. 0.00

We don't carry yet: Speaker / Audio Amplifier
Microcontroller IC (DIP) / Chip
Inductors / Coils / Ferrite

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How It Works

The DIY USB MP3 Player operates as an integrated audio playback system powered by a regulated 5V DC power supply. At the core of the system is the USB MP3 module kit, which houses an onboard microcontroller, digital-to-analog converter (DAC), and amplifiers capable of processing stored audio files from media sources like USB drives or SD cards. The power supply steps and regulates voltage to a steady 5V, safely driving the active logic and audio components without risking electrical overstress. For external audio routing, two 3.5mm female jack sockets are integrated: one functions as an auxiliary input to pass external signals into the module, while the other acts as an audio output line to route processed sound to headphones or external amplifiers. The system also includes an IR receiver and an antenna, allowing wireless remote control operations and FM radio frequency tuning, respectively. Optional tactile switches can be wired directly to the module's designated control pins to provide manual tactile inputs for actions such as play, pause, track skipping, and mode selection. Together, these discrete components interface seamlessly to create a compact, multi-functional media playback unit.

Why Build This

Design and assemble a cost-effective, custom portable audio player suitable for engineering lab audio integration or personal use.

Retrofit older analog speaker systems with modern digital features like USB, SD card playback, and FM radio functionality.

Gain practical hands-on experience in power distribution, signal routing, and peripheral interfacing using discrete electronic components.

Real-World Application

Creating custom low-cost portable audio players, adding MP3/FM capabilities to old speaker systems, or DIY electronics learning projects.

Skills You'll Learn

DC power distribution

audio signal routing

peripheral interfacing

IR signal reception

switch debounce handling

basic hardware integration

Safety Precautions

Ensure the correct regulated +5V DC power supply is used to prevent damage to the module.

Technology Tags

USB

MP3 PLAYER

AUDIO

IR REMOTE

FM RADIO

DIY ELECTRONICS

Frequently Asked Questions

Can I power this MP3 player directly from a standard 9V battery?

No, the module requires a strictly regulated 5V DC power supply. Using a 9V battery directly will exceed the voltage rating and permanently damage the onboard components.

Do I need to write any code or program a microcontroller for this project?

No software or programming is required. The USB MP3 module kit comes with pre-flashed firmware that handles all audio decoding, FM tuning, and user interface controls out of the box.

What is the purpose of the antenna if I am only playing songs from a USB drive?

The antenna is specifically used for the integrated FM radio tuner function of the MP3 module to pick up broadcast radio frequencies clearly. It is not required for USB or auxiliary playback.

Gallery

This page is part of Kitkraft's Project Hub — a curated collection of electronics & robotics projects gathered from the maker community to help students and hobbyists discover and learn to build. Kitkraft does not claim authorship of the original project, and makes no representation as to the accuracy, completeness or safety of third-party source material. The summary and "How It Works" explanation above are AI-generated, rewritten with reference to the original tutorial — not a reproduction of it. Full credit and a direct link to the original source are provided above. If you're the original creator and have a concern about how your work is represented here, please contact us and we'll address it promptly.

Kitkraft Project Hub — curated from the maker community, credited at the source.

PRJ-00957